GB0913902D0 - Telephone communications system increasing a reception count twofold - Google Patents

Telephone communications system increasing a reception count twofold

Info

Publication number
GB0913902D0
GB0913902D0 GBGB0913902.3A GB0913902A GB0913902D0 GB 0913902 D0 GB0913902 D0 GB 0913902D0 GB 0913902 A GB0913902 A GB 0913902A GB 0913902 D0 GB0913902 D0 GB 0913902D0
Authority
GB
United Kingdom
Prior art keywords
twofold
communications system
telephone communications
reception count
system increasing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GBGB0913902.3A
Other versions
GB2462531A (en
GB2462531B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Platforms Ltd
Original Assignee
NEC Infrontia Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Infrontia Corp filed Critical NEC Infrontia Corp
Publication of GB0913902D0 publication Critical patent/GB0913902D0/en
Publication of GB2462531A publication Critical patent/GB2462531A/en
Application granted granted Critical
Publication of GB2462531B publication Critical patent/GB2462531B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephonic Communication Services (AREA)
GB0913902A 2008-08-11 2009-08-10 Telephone communications system increasing a reception count twofold Expired - Fee Related GB2462531B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008206510A JP4807384B2 (en) 2008-08-11 2008-08-11 Telephone communication system, multi-frequency signal receiving method, and program

Publications (3)

Publication Number Publication Date
GB0913902D0 true GB0913902D0 (en) 2009-09-16
GB2462531A GB2462531A (en) 2010-02-17
GB2462531B GB2462531B (en) 2010-07-14

Family

ID=41129870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0913902A Expired - Fee Related GB2462531B (en) 2008-08-11 2009-08-10 Telephone communications system increasing a reception count twofold

Country Status (5)

Country Link
US (1) US8374322B2 (en)
JP (1) JP4807384B2 (en)
AU (1) AU2009208071B2 (en)
CA (1) CA2674844C (en)
GB (1) GB2462531B (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6017279B2 (en) * 1978-12-06 1985-05-01 株式会社日立製作所 Multi-frequency signal receiving device
EP0097754B1 (en) 1982-06-25 1987-01-07 International Business Machines Corporation Tone detector and multifrequency receiver using this detector
CN86101707B (en) * 1985-02-13 1988-12-14 日本电气株式会社 Distribution control mode electronic switch system
US5073941A (en) * 1988-02-01 1991-12-17 Ibm Corporation Multifrequency detection
JPH0269093A (en) 1988-09-05 1990-03-08 Fujitsu Ltd Time division multiplex receiving system for multifrequency signal
US5809133A (en) 1996-05-24 1998-09-15 Advanced Micro Devices, Inc. DTMF detector system and method which performs frequency domain energy calculations with improved performance
US6665350B1 (en) * 1998-09-25 2003-12-16 Legerity, Inc. Method and system for improved analog signal detection
JP4431210B2 (en) 1999-05-10 2010-03-10 株式会社ルネサステクノロジ Frequency deviation detecting device and frequency deviation detecting method

Also Published As

Publication number Publication date
JP4807384B2 (en) 2011-11-02
AU2009208071A1 (en) 2010-02-25
CA2674844C (en) 2014-09-30
US8374322B2 (en) 2013-02-12
JP2010045465A (en) 2010-02-25
GB2462531A (en) 2010-02-17
AU2009208071B2 (en) 2013-07-25
CA2674844A1 (en) 2010-02-11
US20100034329A1 (en) 2010-02-11
GB2462531B (en) 2010-07-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20220810